Reversible gear with adjustable stroke.



No. 741,624.' x PATENTED 00T. 2o, v1903.

o. GARAGGIOLA..

REVERSIBLE GEAR WTTE ADJUSTABLE STROKE.

.APPLIOATION -IILGD JAN. 23. 1903.

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UNITED STATES Patented october 20,1903,

' PATENT OFFICE.

OTTO CARACCI-OLA, OF COLOGNE, GERMANY.

REVERSIBLE aGEAR WITH ADJUSTABLE STROKE..

SPECIFICATION forming part of Letters Patent No.` 741,624, datedOctober 20, 1903.

-Application filed January' 23, 1903. Serial No. 140,236. (No model.)

To all whom it may concern:

Be it known that I, OTTO CARACoIoLA, a citizen of the vGerman Empire,` residing at Benesisstrasse No. 59, Cologne, in the Rhineland, Prussia, Germany,have invented a new and useful Improvement'. in Reversible Gear with Adjustable Stroke,Vv of which the following is a specification. v v

The improvement over the devices hitherto known consists in the fact that the eccentricity of the eccentric can be altered at will at any time and that the extent of the reciprocating movement, the stroke, can thus be controlled.

In the annexed drawings, Figure lis a front view of the device; Fig. 2, aside view with the closing-plate omitted, and Fig. 3 a horizontal section of the device. l View of the crank and lever for adjusting the sheave.

The eccentric b with the adjustable stroke is mounted on the driving-shaft t or a prolongation shaft and is driven by the motor and transmits its motion by means of Vrods c and c' to the disks d, d', and d2, fixed to the shaft of a dierential gear. The adjustable eccentric b consists of two rings and is mounted on a crank e, on the pin f. of which is a sleeve g. The said sleeve g is provided with helical grooves h and is adapted to slide on the pin f, but not to rotate on the same. The lever p is adapted toperform a pendulum movement aboutjits fulcrum and is bifurcated at its lower end, the bifurcated end being provided with two pins q, which take into a groove on the circumference of a'disk r. The

disk r isl rigidly connected to the sleeve g and allows the latter to rotate about the drivingshaft. The stroke of 'the eccentric b is proportional to the throw of the crank e. hole in the eccentric is provided with two helical splines 1I, which take into the helical grooves h inv the sleeve g. The lateral displacement of the eccentric b is limited by stopslc, xed to the driving-shaft and passing through the crank. I The lateral displacement of the sleeve g compels the eccentric to perform a rotary movement about the crank.- pin f. The adjusted stroke of the eccentric b transmits the motion of the driving-shaft through the rods c and c' to the disk d and rings d and (Z2, which are loosely mounted on Fig. 4 is a front l TheY the driven shaft Z. The disk d is situated be- 'tween the rings d' and d2 and is providedon each side with `a circu mferential groove which serves as a bearing for one of the rings ol or d2. The disk d and the rings d'and d2 are therefore at all times able to perform the opposite rotary movement required by the arrangement of the eccentric. To the lateral surfaces of the disk d and the rings d and d2 equal numbers of springpressed pawls m are attached, which are so arranged in their bearings that they rotate with the respective ring or the disk. To the right and left of the' disk Vtwo disks 'n and n are fixed to the driven shaft. The inner' surfaces of these disks are provided withteeth o o', directed toward the pawls, the teeth 'on `one disk beingforwardly directed and those on the other disk rearwardly directed. Y

The action of the device is as follows: When the sleeve g is displaced on the crank-pin f by means of the lever p, the helical grooves h, which engage the helical splines t', adjust the eccentric for a certain'stroke. This stroke can be of any desired length within the limits according to whether-thel sleeve g is moved more or less forward or backward. The rotary movementgis transmitted by the rods c and c to the disk d and rings d and d2 and by the said disk and rings to the right-hand or left-hand toothed disk n or 'n' according to the adjustment of the central disk d, connected to the rings. The pawls of the ring d' or those of the disk d work with the disk n', and Ain the other case the pawls of the ring d2 or those of the disk CZ work with the disk n. The pawls/m are so arranged that during the work- -ing'the Vfirst pawl touches the base of the intervals between the teeth when the second pawlis removed from the said base by the for adjustment for any desired stroke either IOC) for forward or backward movement, comprising an adjustable eccentric, a sleeve provided with helical grooves for adj Listing said eccentric, means for shifting said sleeve, a crankpin on which said sleeve is adapted to slide, and means for preventing said sleeve from turning on said prin.

2. In a device' of the nature set forth, the combination of an adjustable eccentric, a change disk and rings, rods connecting said eccentric with said disk and rings, said disk and rings being arranged so that an opposite rotary movement of said disk and rings is at all times insured, pawls pivoted to said disk and rings, a shafton which said disk is mounted, and toothed disks secured to said shaft and adapted to be engaged by said pawls to drive said shaft.

In Witness whereof I have hereunto set my hand in presence of two Witnesses.

OTTO CARACCIOLA. XVitnesses:

CARL SCHMITT, GUSTAV SiNNHoLD. 

